an unclassified memo says it is legal for the u.s. government to kill u.s. citizens if they believe they're senior al- qaida leaders. 11 senators, most democrats have demanded that the president provide justification. they have concerns about the program. >> our concern is to coop keep the american people safe in consistent with our laws and our values. there's no court in the united states or anywhere around the world that would accept this view that a president, one person can decide how and when to kill its own citizens without any checks or balances. >> reporter: he will also likely face questions about water boarding. he had said in the past that it saves american lives, but in a questionnaire ahead of the hearings, he said he had some personal reservations about that program. these hearings get underway at 2:30 this afternoon. >>> there was supposed to be a vote today on the confirmation of president obama's choice to head the pentagon. but it was postponed yesterday. republicans are demanding more answers from hagel about his finances. >>> yesterday t